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authorJean Delvare <khali@linux-fr.org>2009-08-04 06:55:34 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-09-15 12:50:48 -0400
commit4622709445705c1e423d2addcfd8ccae052fe0ba (patch)
treec9032374e8f99a5bb9b8b8e012e0a6de4c9c3846 /include/linux/device.h
parentccb86a6907c9ba7b5be5f521362fc308e80bed34 (diff)
Driver core: Add support for compatibility classes
When turning class devices into bus devices, we may need to temporarily add links in sysfs so that user-space applications are not confused. This is done by adding the following API: * Functions to register and unregister compatibility classes. These appear in sysfs at the same location as regular classes, but instead of class devices, they contain links to bus devices. * Functions to create and delete such links. Additionally, the caller can optionally pass a target device to which a "device" link should point (typically that would be the device's parent), to fully emulate the original class device. The i2c subsystem will be the first user of this API, as i2c adapters are being converted from class devices to bus devices. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Diffstat (limited to 'include/linux/device.h')
-rw-r--r--include/linux/device.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h
index e19e40a3dcbe..62ff53a67931 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -225,6 +225,14 @@ extern void class_unregister(struct class *class);
225 __class_register(class, &__key); \ 225 __class_register(class, &__key); \
226}) 226})
227 227
228struct class_compat;
229struct class_compat *class_compat_register(const char *name);
230void class_compat_unregister(struct class_compat *cls);
231int class_compat_create_link(struct class_compat *cls, struct device *dev,
232 struct device *device_link);
233void class_compat_remove_link(struct class_compat *cls, struct device *dev,
234 struct device *device_link);
235
228extern void class_dev_iter_init(struct class_dev_iter *iter, 236extern void class_dev_iter_init(struct class_dev_iter *iter,
229 struct class *class, 237 struct class *class,
230 struct device *start, 238 struct device *start,